A forward projector/backprojector (30) for a CT scanner (10) includes a VME interface (36) which loads data onto and off of the forward projector/backprojector (30), and a CPU (42) which controls data flow. An array of ASICs (60a-x) is included. Each ASIC has two pipelines along which data is subjected to pipeline operations including one of a forward projection algorithm and a backprojection algorithm. Double-buffered memories for storing data subject to the pipeline operations are arranged on ...

A method for decoding an algebraic-coded message including determining a discrepancy indicator; determining an error locator polynomial according to a modified Berlekamp-Massey algorithm such that an uncorrectable message is detected; and producing a perceptible indication of the detected uncorrectable message. An apparatus includes storage devices, arithmetic components, and an uncorrectable message detector.

A forward error correction (FEC) method is provided including an FEC dynamic central station and a plurality of FEC dynamic remote stations that transmit bearer data and corresponding error correction data therebetween during a plurality of time frames. The error rate of the communication channel is measured and the amount of error correction data transmitted is accordingly and dynamically adjusted, so that the minimum amount of overhead required to effectively transmit the error correction data...

A feed foward amplifier including a first amplifier for amplifying a first input signal; an extraction unit for extracting a distortion element added to a second signal output from the first amplifier; a second amplifier for amplifying the distortion element; an adder for inverting the phase of either the second signal or of a third signal output from the amplifier and for adding these signals; and a controller for controlling the supply of power to the second amplifier based on a level of the f...

A motorcycle forward lamp comprising a housing having an optically transmissive lens and an opening, an elastomer member mounted to the housing, and a light source assembly mounted (e.g., detachably) to the elastomer member and positioned within the opening. The light source assembly is isolated from the housing by the elastomer member. A shield is detachably mounted and positioned within the housing between the light source and the lens. A fastener and a washer are secured to the housing and po...

A forward looking infrared (FLIR) device implemented using complementary metal oxide semiconductor (CMOS) techniques is disclosed. The device includes optics (10) for focusing infrared energy onto a scanner (12) for scanning across a detector array 16; a signal conditioning integrated circuit 18 for producing television compatible video signals from the detector array outputs which are electrical signals representative of the infrared energy impinging thereon; and a monitor (2) for displaying th...

A system of mirrors for a vehicle which augments an operators vision to allow a clear vision path past a forward obstacle. The operators vision is reflected backwards by a first mirror. This first mirror is angles towards a second mirror facing forward. The resulting reflection of the second mirror allows the operator to see along side of any obstruction which may be blocking forward vision, such as a larger vehicle.

A feed forward amplifier comprises a main amplifier 10 composed of a plurality of power amplifiers 8 and 9 combined in parallel. In addition to the plurality of power amplifiers, this feed forward amplifier includes a distortion detecting amplifier 25 for detecting the distortion components, having a distortion characteristic in a predetermined relationship with the distortion characteristic of the main amplifier. It also omits a distortion detecting power combiner 23 otherwise located after a m...

A forward error correction method including inserting at least one filler symbol into an input data stream at a pre-determined position, thereby generating a precoded symbol group, FEC encoding the precoded symbol group, thereby generating a code word, removing at least one of the filler symbols from the code word, thereby generating an optimized code word, inserting at least one filler symbol into the optimized code word at the predetermined position, thereby generating a deoptimized code word,...

A turbine nozzle includes a row of vanes joined to radially outwardly inclined outer and inner bands. Each vane has camber and an acute twist angle for importing swirl in combustion gases discharged at trailing edges thereof. The trailing edges are tilted forwardly from the inner band to the outer band for increasing aerodynamic efficiency.